Outputting the build is a feature request, and IMO an unnecessary one. Every public release of BYOND should technically have a new version number (currently: 400). The builds are intended for private use. Things have just gotten a bit muddled during this beta testing period, but that will pass shortly.

im not using it for outputting... well not exactly
just that if youre using the original release of 4.0, when the macros on windows were all screwed up, the messanger system i made wont work properly, so i was gona tell people to update if they didnt have the newest version <.<
which turned out to not work bekuz of this <.O